QRCode (Quick Response Code) is a kind of 2-D
(two-dimensional) symbology developed by Denso Wave and released in
1994 with the primary aim of being a symbol that is easily
interpreted by scanner equipment. QR Code is capable of 360 degree
(omni-directional), high speed reading. QR Code accomplishes this
task through position detection patterns located at the three
corners of the symbol. These position detection patterns guarantee
stable high-speed reading, circumventing the negative effects of
background interference.
Use Caret (^)
The UseCaret propeties is set to true by default which is only apply
to Code128, UccEan128, Sscc18, Scc14, PDF417, MacroPDF417, QR Code,
and DataMatrix etc. where full ASCII is accepted as encoding. The 3
digits data following the caret will be treated as ASCII code, e.g.
^010 is \n; ^009 is a tab; ^065 is character 'A'.
QRCode Properties
Besides the properties to general barcode, the following properties
belongs to QRCode only:
QRCodeBarSize gets or sets the narrow bar
size in inches for QRCode. Default is 0.02 inch.
QRCodeEncoding gets or sets the QR Code
Encoding to use on that symbology.. Default is Auto encoding. Four
type of mode available:
- Binary: it is used to encode all 256 8-bit byte values.
- Numeric: it is used to encode numeric data.
-
Alphanumeric: it is used to encode all printable ASCII character
data.
-
Auto: it switches between the other three encoding method for
small size.
QRCodeErrorCorrectionLevel gets or sets the
Error Correction Level for QRCode (Level L, M, Q, H). Default is
M.
QRCodeVersion gets or sets the QRCode
Version. Default is Auto.
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